* Steelmaking (honorable mention) 800 BC - 1500 AD Haya people of Tanzania (jan 1, 800 BC – jan 1, 1500)
Description:
Steel is an alloy of iron and carbon.Archaeologist Peter R. Schmidt discovered evidence through a combination of archaeology and oral tradition that the Haya had been smelting iron ore to make carbon steel for around 2300–2000 years.[7][11][37][38] This discovery happened when Schmidt was working at the village of Kataruka. Elders at Kataruka informed Schmidt that their ancestors had smelted iron underneath a sacred shrine tree called Kaiija ("the place of the forge").[38] Curious to verify their own history, elders asked Schmidt to conduct an excavation underneath the sacred shrine tree.[39] Results of this excavation led to the discovery of an iron furnace carbon-dated to the 1st millennium BC.
Invented: Independently
Steel making developed in Europe during the 19th century.
https://en.wikipedia.org/wiki/Haya_people
Added to timeline:
Date:
jan 1, 800 BC
jan 1, 1500
~ 2301 years